C8051F930-GQ Silicon Laboratories Inc, C8051F930-GQ Datasheet - Page 68

• Manufacturer Part Number: C8051F930-GQ
• Description: IC 8051 MCU 64K FLASH 32-LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F9xxr

Specifications of C8051F930-GQ

• Program Memory Type: FLASH
• Program Memory Size: 64KB (64K x 8)
• Package / Case: 32-LQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 24
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 3.6 V
• Data Converters: A/D 23x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F9x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 4.25 KB
• Interface Type: I2C/SMBus/SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F930DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 23-ch x 10-bit
• No. Of I/o's: 24
• Ram Memory Size: 4KB
• Cpu Speed: 25MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1478 - PLATFORM PROG TOOLSTCK F920,F930336-1477 - PLATFORM PROG TOOLSTCK F920,F930336-1473 - KIT DEV C8051F920,F921,F930,F931336-1472 - BOARD TARGET/PROTO W/C8051F930
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1466

C8051F93x-C8051F92x
5.2.2. Tracking Modes
Each ADC0 conversion must be preceded by a minimum tracking time in order for the converted result to
be accurate. The minimum tracking time is given in Table 4.9. The AD0TM bit in register ADC0CN controls
the ADC0 track-and-hold mode. In its default state when Burst Mode is disabled, the ADC0 input is contin-
uously tracked, except when a conversion is in progress. When the AD0TM bit is logic 1, ADC0 operates in
low-power track-and-hold mode. In this mode, each conversion is preceded by a tracking period of 3 SAR
clocks (after the start-of-conversion signal). When the CNVSTR signal is used to initiate conversions in
low-power tracking mode, ADC0 tracks only when CNVSTR is low; conversion begins on the rising edge of
CNVSTR (see Figure 5.2). Tracking can also be disabled (shutdown) when the device is in low power
standby or sleep modes. Low-power track-and-hold mode is also useful when AMUX settings are fre-
quently changed, due to the settling time requirements described in “5.2.4. Settling Time Requirements” on
page 70.
68
(AD0CM[2:0]=000, 001,010
Figure 5.2. 10-Bit ADC Track and Conversion Example Timing (BURSTEN = 0)
Timer 1, Timer 3 Overflow
Write '1' to AD0BUSY,
(AD0CM[2:0]=100)
Timer 0, Timer 2,
SAR Clocks
AD0TM=1
AD0TM=0
011, 101)
AD0TM=1
AD0TM=0
CNVSTR
Clocks
Clocks
SAR
SAR
Low Power
or Convert
Low Power
or Convert
Track or
A. ADC0 Timing for External Trigger Source
Convert
Track or Convert
B. ADC0 Timing for Internal Trigger Source
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Track
Track
Rev. 1.1
1 2 3 4 5 6 7 8 9
Convert
Convert
Convert
Convert
10 11 12 13 14
Low Power Mode
Track
Low Power
Mode
Track